Alright, let's work through 3715 times 4156 step by step
3715 × 4156 = 4156 × (3715)
+ 4156 × 5 what gives us 20780
+ 4156 × 10 producing 41560
+ 4156 × 700 resulting in 2909200
+ 4156 × 3000 which equals 12468000

= 15439540
